There were two distinct lines of evolution of accentual Latin verse in the Middle Ages; and although the faculty of song was a moving energy in both, it worked in one of them more visibly than in the other. Along the one line accentual verse developed pursuant to the ancient forms, displacing quantity with accent, and evolving rhyme. The other line of evolution had no connection with the antique. It began with phrases of sonorous prose, replacing inarticulate chant. These, under the influence of music, through the creative power of song, were by degrees transformed to verse. The evolution of the Sequence-hymn will be the chief illustration. With the finished accentual Latin poetry of the twelfth century it may become impossible to tell which line of rhythmic evolution holds the antecedent of a given poem. In truth, this final and perfected verse may often have a double ancestry, descending from the rhythms which had superseded metre, and being also the child of mediaeval melody. Yet there is no difficulty in tracing by examples the two lines of evolution. To illustrate the strain of verse which took its origin in the displacement of metre by accent and rhyme, we must look back as far as Fortunatus. He was born about the year 530 in northern Italy, but he passed his eventful life among Franks and Thuringians. A scholar and also a poet, he had a fair mastery of metre; yet some of his poems evince the spirit of the coming mediaeval time both in sentiment and form. He wrote two famous hymns, one of them in the popular trochaic tetrameter, the other in the equally simple iambic dimeter. The first, a hymn to the Cross, begins with the never-to-be-forgotten “Pange, lingua, gloriosi proelium certaminis”; and has such lines as “Crux fidelis, inter omnes arbor una nobilis * * * * * Dulce lignum, dulce clavo dulce pondus sustinens!” In these the mediaeval feeling for the Cross shows itself, and while the metre is correct, it is so facile that one may read or sing the lines accentually. In the other hymn, also to the Cross, assonance and rhyme foretell the coming transformation of metre to accentual verse. Here are the first two stanzas: “Vexilla regis prodeunt, Fulget crucis mysterium, Quo carne carnis conditor Suspensus est patibulo. Confixa clavis viscera Tendens manus, vestigia Redemtionis gratia Hic immolata est hostia.” Passing to the Carolingian epoch, some lines from a poem celebrating the victory of Charlemagne’s son Pippin over the Avars in 796, will illustrate the popular trochaic tetrameter which had become accentual, and already tended to rhyme: “Multa mala iam fecerunt ab antico tempore, Fana dei destruxerunt atque monasteria, Vasa aurea sacrata, argentea, fictilia.”[303]